Novel optical fiber inertial navigation system structure

Abstract

The utility model provides a novel optical fiber inertial navigation system structure. Belongs to the technical field of fiber inertial systems. The optical fiber inertial navigation system structure is technically characterized by comprising a box body, a table body, a bottom cover, a power source fixing plate and a core plate fixing plate, the box body, the table body, the bottom cover, the power source fixing plate and the core plate fixing plate are assembled through a plurality of sets of screws to form a main body of the optical fiber inertial navigation system structure, a plurality of rear-mounted nut aviation plugs are arranged on one side of the box body, and the box body is arranged to be a blind cavity. A blank cap is arranged on the mounting outer side of the box body and the table body, a sealing groove is formed in the bottom of the box body, and a boss is arranged on the bottom cap; the utility model aims to provide a novel optical fiber inertial navigation system structure with relatively strong inertial navigation sealing performance. The method is used for solving the problems that an existing optical fiber inertial system is poor in inertial navigation sealing performance, and when the existing optical fiber inertial system is used in a humid or dusty working environment, water vapor or dust can enter the interior along an inertial navigation dismounting and mounting part, so that accelerated aging or short circuit of electrical components in the inertial navigation is caused.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber inertial systems, in particular to a novel optical fiber inertial navigation system structure. Background Art

[0002] Currently, fiber-optic inertial navigation systems are split into a top cover, a housing, and a bottom cover for easy maintenance. Although this facilitates subsequent maintenance and repair after assembly, the inertial navigation system is not well sealed. When used in humid or dusty working environments, moisture or dust can enter the system through the disassembly and assembly areas, accelerating the aging of the internal electrical components or causing short circuits. Utility Model Content

[0003] The purpose of the present invention is to provide a novel fiber optic inertial navigation system structure to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A novel fiber-optic inertial navigation system structure includes a box, a platform, a bottom cover, a power supply fixing plate, and a core board fixing plate. The box, platform, bottom cover, power supply fixing plate, and core board fixing plate are assembled by multiple sets of screws to form the main body of the fiber-optic inertial navigation system structure. One side of the box is provided with a plurality of post-installed nut aviation plugs. The box is configured as a blind cavity, and a blind cover is provided on the outside of the box and platform.

[0006] The box body, table body, bottom cover, power supply fixing plate and core board fixing plate are constrained by the installation position relationship between multiple groups of screws. The table body, power supply fixing plate and core board fixing plate are fixed by screws to form an IMU. The IMU and the box body are positionally constrained by the side holes of the box body and are fixed with 8 M4 screws. A sealing groove is provided at the bottom of the box body, and a boss is provided on the bottom cover. The bottom cover and the box body are positionally constrained by the cooperation of the sealing groove and the boss and are fixed with 8 M4 screws, thereby realizing the disassembly of the bottom cover, box body and table body and ensuring the mutual position relationship and fixing direction.

[0007] As a further solution of the present invention: the wall thickness of the box body is not less than 6 mm, and the thickness of the bottom cover is not less than 7 mm.

[0008] As a further solution of the present invention: the bottom cover is suitable for external installation, so the flatness of the bottom cover is less than 0.1 mm.

[0009] As a further solution of the present invention: weight-reducing grooves are provided on the sides of the box body and the inner side of the bottom cover.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] 1. The box is set as a blind cavity, and the table assembly can only enter and exit from a fixed direction, which reduces the assembly steps and shortens the working time.

[0012] 2. A sealing groove is set at the bottom of the box to effectively increase the sealing between the box and the bottom cover.

[0013] 3. The box and platform are installed and fixed on the outside with a cover to increase the sealing of the structure.

[0014] 4. The use of rear-mounted nut aviation plugs reduces the number of openings in the box and effectively improves the sealing of the box.

[0015] 5. A boss is added to the bottom cover of the box. The addition of the boss can prevent the direction of the box and the bottom cover from matching and prevent the wrong assembly direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below with reference to the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

[0017] Figure 1 This is a structural diagram of a new fiber optic inertial navigation system.

[0018] Figure 2 This is an exploded diagram of the structure of a new fiber-optic inertial navigation system.

[0019] Figure 3 This is an exploded diagram from another perspective of a new fiber optic inertial navigation system structure.

[0020] Figure 4 A cross-sectional view of the structure of a new fiber-optic inertial navigation system.

[0021] In the figure: 1. Box body; 2. Table body; 3. Bottom cover; 4. Power supply fixing plate; 5. Core board fixing plate; 6. Rear-mounted nut aviation plug; 7. Blind cover. DETAILED DESCRIPTION

[0022] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0023] See also Figure 1-4, a new fiber optic inertial navigation system structure, including a box body 1, a platform body 2, a bottom cover 3, a power supply fixing plate 4, and a core board fixing plate 5. The box body 1, the platform body 2, the bottom cover 3, the power supply fixing plate 4, and the core board fixing plate 5 are assembled by multiple sets of screws to form the main body of the fiber optic inertial navigation system structure. The power supply fixing plate 4 and the core board fixing plate 5 are fixed to the platform body 2 by screws. One side of the box body 1 is provided with a number of rear-mounted nut aviation plugs 6, and the rear-mounted nut aviation plug 6 has five aviation sockets for external definition. The aviation plug is adjusted according to the aviation plug model selected according to the input and output definitions of the inertial navigation system. At the same time, the aviation plug can also be used as a replaceable component in the inertial navigation system. The connector can be changed for different output definitions of the same inertial navigation system. By adjusting the size of the aviation plug hole and the position of the hole spacing, an inertial navigation system with multiple interfaces can be made. The box body 1 is set as a blind cavity, and a blind cover 7 is provided on the installation outside of the box body 1 and the platform body 2. The box body 1, platform body 2, bottom cover 3, power supply fixing plate 4, and core board fixing plate 5 are constrained by the installation position relationship between multiple groups of screws. The platform body 2, power supply fixing plate 4, and core board fixing plate 5 are fixed by screws to form an IMU. The IMU and the box body 1 are positionally constrained by the side holes of the box body and are fixed with 8 M4 screws. A sealing groove is provided at the bottom of the box body 1, and a boss is provided on the bottom cover 3. The bottom cover 3 and the box body 1 are positionally constrained by the cooperation of the sealing groove and the boss and are fixed with 8 M4 screws, thereby realizing the disassembly of the bottom cover 3, box body 1 and platform body 2 and ensuring the mutual position relationship and fixed direction. The box body 1 serves as the reference of the entire inertial navigation system and also fixes the platform body 2. Therefore, 8 through holes with countersunk holes are added to the side wall of the box body 1 without destroying the beauty of the structure, and the hole box is sealed by 8 blind covers 7.

[0024] Furthermore, the wall thickness of the box body 1 is not less than 6 mm. If the thickness is too low, it will affect its strength and easily deform after long-term use. Therefore, the side thickness of the box body 1 is not less than 6 mm, and 2A12-T4 aluminum ingots are used for overall processing. The thickness of the bottom cover 3 is not less than 7 mm. The bottom cover 3 is installed externally, the strength cannot be reduced, and the flatness is less than 0.1 mm, so the thickness is not less than 7 mm.

[0025] Furthermore, the bottom cover 3 is suitable for external installation, so the flatness of the bottom cover 3 is less than 0.1 mm.

[0026] Furthermore, weight-reducing grooves are provided on the sides of the box body 1 and the inner side of the bottom cover 3 .

[0027] The assembly process of the fiber-optic inertial navigation system structure is as follows: first, the platform 2, fiber optic gyroscope, accelerometer, shock absorber and other components are fixed with screws to form an onboard inertial measurement device, the power module and core board are fixed to the power supply fixing plate 4 and the core board fixing plate 5 with screws, the inertial measurement device is fixed to the inner cavity of the parallel propulsion box 1 with 8 groups of screws, and then sealed with a blind cover 7. The sealing strip is embedded in the sealing groove at the bottom of the box 1 and fixed to the bottom cover 3 with screws.

[0028] The above embodiments are preferred implementation methods of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field can, without departing from the scope of the technical features of the present invention, make partial changes or modifications to the technical contents disclosed in the present invention and make equivalent embodiments without departing from the technical features of the present invention. These modifications still fall within the scope of the technical features of the present invention.

Claims

1. A novel fiber optic inertial navigation system structure, comprising a box body (1), a platform body (2), a bottom cover (3), a power supply fixing plate (4), and a core board fixing plate (5), characterized in that: The box body (1), the platform body (2), the bottom cover (3), the power supply fixing plate (4), and the core board fixing plate (5) are assembled by multiple sets of screws to form the main body of the fiber optic inertial navigation system structure; a plurality of rear-mounted nut aviation plugs (6) are provided on one side of the box body (1); the box body (1) is configured as a blind cavity; and a blind cover (7) is provided on the outside of the installation of the box body (1) and the platform body (2); The box body (1), the platform body (2), the bottom cover (3), the power supply fixing plate (4), and the core board fixing plate (5) are constrained by the installation position relationship between multiple groups of screws. The platform body (2), the power supply fixing plate (4), and the core board fixing plate (5) are fixed by screws and form an IMU. The IMU and the box body (1) are positionally constrained by the side holes of the box body and are fixed with 8 M4 screws. A sealing groove is provided at the bottom of the box body (1), and a boss is provided on the bottom cover (3). The bottom cover (3) and the box body (1) are positionally constrained by the cooperation between the sealing groove and the boss and are fixed with 8 M4 screws, thereby realizing the disassembly of the bottom cover (3), the box body (1), and the platform body (2) and ensuring the mutual position relationship and fixing direction.

2. A novel fiber-optic inertial navigation system structure according to claim 1, characterized in that: The wall thickness of the box body (1) is not less than 6 mm, and the thickness of the bottom cover (3) is not less than 7 mm.

3. The novel fiber optic inertial navigation system structure according to claim 1 is characterized in that: The bottom cover (3) is suitable for external installation, so the flatness of the bottom cover (3) is less than 0.1 mm.

4. The novel fiber optic inertial navigation system structure according to claim 1 is characterized in that: The side of the box body (1) and the inner side of the bottom cover (3) are both provided with weight-reducing grooves.

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